Piston ring



J.l H. LANTERMAN APIsToN RING Filed Sem.. 26. 1925 lll T l "HH Illli .Hime l@ i924.

/NVE/VTR fHLanermang ill Hi WITNESS/58 l Arrow/Ens Patented .lune 10, 1924.,

UNET@ STATES man@ PATENT PISTON RING.,

Application filed September 26, 1923. Serial No. 664,989.

of Oklahoma, have invented certain new and useful Improvements in Piston Rings, of which the following is a specification.

This invention relates to pistons and more particularly to a piston ring for effecting an equal distribution of the lubricating oil.

The principal and most important object of this invention is the provision of a piston having a ring groove therein and a passage leading from the ring groove to its interior,

with a new and improved form of piston rin ther objects and advantages of the invention will be apparent during the course of the following description.

The invention is illustrated by way of eX- ample in the accompanying drawings, in which,

Fi e 1 is a side elevation of a piston supp ied with my improved piston rings.

Figure 2 is a plan viewof the piston ring constructed in accordance with my invention.

Figure 3 is a sectional, view in detail dis- `closing the construction of my piston ring and the passages in the piston which connect the ring grooves with the interior of the iston.

Figure 4 is a sectional view in detail disclosing'the construction of 'my piston ring and more particularly the passages for connecting grooves formed in opposite walls of the ring.

Referring to the drawings, 1 designates a piston, the outer walls of which are provided with a plurality of piston ring grooves 2 in which are adapted to be inserted rings 3. Connecting the ring grooves 2 with the interior of the piston are a plurality of passages 4 which extend through the wall of the piston and are inclined downwardly from the rear portion of the grooves 2 vtoward the opening of the passage in the inner wall of the piston.

Each piston ring comprises a ring of cast as shown at 5 whereby the free ends of the iron having its ends in overlapping relationy of the ring?) is formed a rectangular rabbet 6 which, when the ring is in position, forms 55 with the vertical and bottom walls of the groove 2 a rectangular oil channel 7. At the lower edge of the outer periphery of the rlng 3 is formed a rabbet 8 which is substantially V-shaped in cross section and the ring 1s so portioned, that above the rabbet 8 the ring projects to contact with the wall 9 of the cylinder, the lower edge of said ring pro- Jeeting out of the outer surface of the piston 1 and being spacedv from the wall 9 of the 65 cylinder 11.

Radially disposed passages 12 connect the rabbet 6 with the rabbet 8 whereby oil colflected in the rabbet 8 passes through the radial passages 12 and into the channel 7 70 of the rabbet 6 located in the inner wall of the ring 3. Oil collected in the rabbet 6 of the ring groove 2 is adapted to drain through the inclined and rearwardly extend-v ing passages 4 in the piston 1 to the interior 75 of the piston whence the oilwill fall to theY bottom of the crank case. AThe radial passages 12 are of greater height than either of the rabbets to insure -free communication between said rabbets.

While Ihave herein shown and described the preferred for'm of myinvention, it is to be understood that various changes and modifications may be made herein without departing from the spirit of the invention or the spirit andyscope of the appended claims.

What I claim is:

l. The combination with a hollow piston havin a ring groove and provided with passages eading through the piston wall from the ring groove; of a piston ring having rabbets at its inner and outer lower edges and provided with communicating passages between said rabbets-and through the cylinder wall, the 'inner rabbet being of less 95 height than the outer rabbet, said outer rabbet -being V-shaped in cross section and havlng its inner face at an acute angle at the base of the angle to form a knife edge inwardly spaced from the outer periphery of the ring lbody and overhangingthe outer surface of the piston.

2. The combination with a hollow piston having a rin groove Aand provided with passages leadmg throu h the piston wall yfrom the ring groove; o a piston ring having rabbets at its inner and outer lower outer rabbet being V-shaped in cross section edges and provided with communicating and having its inner face at an acute angle passages between said rabbets and through t0 form a knife edge inwardly spaced from Ml the cylinder wall, said passages being of the outer periphery of the ring body and 5 greater height than said rabbets, said inner overhanging the outer surface of the piston.

rabbet being of less height than the outer rabbet and rectangular in cross section, said JAMES H, LANTERMAN. 

